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4082 :: how to send udp datagram?

• luntik2012 (orginal) [2018-07-27T14:40:07+02:00] view original

  Found example with sending datagram here: https://nim-lang.org/docs/net.html

  Doing the same:

  import net
  
  var s = newSocket()
  echo $s.sendTo("192.168.1.2", Port(50001), "Hello")
  Run

  I have bound port on this addesss:

  
  $ sudo netstat -tuplen | grep 50001
  udp        0      0 192.168.1.2:50001       0.0.0.0:*                           1000       32716323   4938/france2
  Run

  Getting exception:

  
  Traceback (most recent call last)
  proto.nim(33)      proto
  net.nim(1444)            sendTo
  net.nim(1428)            sendTo
  SIGPIPE: Pipe closed.
  Run

  I can send packets to this port using other languages. What's going wrong?

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• mashingan (orginal) [2018-07-27T16:58:24+02:00] view original

  var socket = newSocket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)
  Run

  newSocket is default with IPPROTO_TCP

  Dunno why the example is like that though.

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• luntik2012 (orginal) [2018-07-28T17:19:32+02:00] view original

  Thank you. Don't know why didn't I look at sources. Could somebody fix this example please? @Araq possibly?

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• mashingan (orginal) [2018-07-28T18:40:18+02:00] view original

  In most cases, reading docs is sufficient.

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• euant (orginal) [2018-07-30T13:09:06+02:00] view original

  @mashingan the documentation explicitly contains the following as an example of using UDP, which is what @luntik2012 was referring to:

  var socket = newSocket()
  socket.sendTo("192.168.0.1", Port(27960), "status\n")
  Run

  I have submitted a PR to update the documentation: https://github.com/nim-lang/Nim/pull/8475/files

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• treeform (orginal) [2018-07-31T19:34:40+02:00] view original

  I ran into this as well. Thank you for fixing it!

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